As long as there is not water penetration, your framing, foundation, plaster, floors, and wood work tend to hold up pretty much forever.

You need to know the soil classification and run testing on the material before you know compaction is adequate given the moisture % in it. 

I then ran some of the exposed CSST in the basement through cast iron conduit to avoid exposure to future rehab screw penetration. 

Add a couple blocks to the joists, some joist hangers, and you'll be fine structurally.The mold is much more concerning, one for the cleanup where you can see, but also there's moisture that's causing it. 

All that white and black fuzz is mold from moisture.

I'll mention that my estimate is that I collected between 30 and 40 gallons of water, so something more than that actually penetrated. 

It is not in a flood zone, as it is up on a hill, although there was some moisture in the basement.

However, I've read to proceed with caution when adding insulation to old brick building (100+ years in my case) because it can result in freeze/thaw damage due to increased moisture, rotting joists and beams that are embedded into the wall, etc.I believe one of my upstairs units along the same wall is lacking insulation as well, which has resulted in frost in the drywall on really cold days (see attached pics). 

My lines are old cast iron and when it gets really dry, those trees are 'smart' enough to seek out any moisture. 

Don't assume your GC knows what he's doing, learn about how to flash around different openings and penetrations so you can keep an eye on them during construction.